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20 lines
564 B
Python
20 lines
564 B
Python
from django.forms import ValidationError
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from django.utils.translation import ugettext as _
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def check_no_balance(is_balance):
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"""This functions checks that no Paiement with is_balance=True exists
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Args:
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is_balance: True if the model is balance.
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Raises:
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ValidationError: if such a Paiement exists.
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"""
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from .models import Paiement
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if not is_balance:
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return
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p = Paiement.objects.filter(is_balance=True)
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if len(p) > 0:
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raise ValidationError(_("There is already a payment method for user balance."))
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